No one can ever believe that this is a sketch. First of all, the art is amazing and above that, this is a 3d sketch. It definitely appears to be standing over the sheet of paper but least do you know that the paper sheets behind the front sheet have also been used to sketch. Most of all, the fact is shocking that this 3d illusion appears out of just pencil strokes. The ship appears to be so realistic that one can often mistake for a mesh created in a 3d software.